Question

3 multiple choice 16.6 points dok 2: why is antibiotic resistance a concern for public health? it causes antibiotics to become more effective over time, making them less necessary. it makes infections easier to treat with lower doses of antibiotics for a longer time. it prevents bacteria from spreading between people because it renders it no longer infectious. it can lead to infections that are harder to cure and require stronger medications. 4 multiple choice 16.6 points dok 1: which of the following best defines genetic drift? the non - random differential survival and reproduction of individuals. the movement of alleles between populations. the introduction of new alleles into a population through mutation. the change in allele frequencies in a population due to random chance.

Explanation:

For question 3:

• Antibiotic resistance means bacteria can survive antibiotic treatment. This leads to infections that are harder to cure as standard antibiotics don't work, so stronger medications (which may have more side - effects or be less available) are needed.
• Option 1 is wrong because antibiotic resistance makes antibiotics less effective. Option 2 is incorrect as it makes infections harder (not easier) to treat. Option 3 is wrong because antibiotic - resistant bacteria can still spread.

For question 4:

• Genetic drift is defined as the change in allele frequencies in a population due to random chance.
• The non - random differential survival and reproduction of individuals is natural selection. The movement of alleles between populations is gene flow. The introduction of new alleles into a population through mutation is mutation (a separate evolutionary mechanism).

Answer:

1. It can lead to infections that are harder to cure and require stronger medications.
2. The change in allele frequencies in a population due to random chance.